Blender shaded mode view problem
The Shading_View_Problem.blend file that you uploaded is not showing the problem for me.

The only way I can reproduce what you have is if I enable the Scene World lighting in the Shading drop down menu then in the Shader Editor I switch from Object to World and then disconnect the Background node from the Worlds Output node. This sometimes results in what you are experiencing but not always. The 3D view remains with the Black cube etc until I move the cursor back to the 3d Editor again, then the scene seems to update and turn the whole view black.



I have no idea if this is a bug or something to do with the graphics card (mine is a 1080 ti with updated drivers) or something else completely.

All I can suggest is that you download 2.80 again, sorry.